Optical Fiber Embedded Beam for Subgrade Distributed Settlement monitoring：Experiments and Numerical Modeling
Rattachement africain : cn. Niveau de preuve : code pays fourni par la source.
Le résumé fourni par la source
In this study, Brillouin optical time-domain analysis (BOTDA) sensing technology was utilized for monitoring settlement in a similarity model of a highway subgrade. As contact winding cannot be used for an optical fiber that is buried directly in soil, uncoupling between. the fiber and the soil can occur. Thus, an optical-fiber-embedded beam (OFEB) was developed, and a method for measuring and calculating the beam deformation was proposed. A calibration test and a test on a similarity model of a subgrade were carried out to investigate the applicability and monitoring accuracy of the OFEB. It was concluded that the OFEB can accurately measure beam deflection, where the maximum relative error between measurements by the optical fiber and a displacement transducer was approximately 5%. The OFEB was embedded directly into a similarity model of a subgrade to monitor settlement. The deflection deformation of the OFEB was found to be close to the subgrade settlement over a certain settlement range with a relative error below 8.1%. Thus, the OFEB can be used to realize measure large-range distributed settlement in a subgrade. A numerical simulation was performed to identify appropriate beam dimensions and material design parameters, thereby extending the measurement range before decoupling of the OFEB and soil occurs. The enhancement of the measurement range and accuracy of the OFEB based on the preliminary experiments carried out in this study enables further investigation of settlement monitoring.
Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.
Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- Optical Fiber Embedded Beam for Subgrade Distributed Settlement monitoring：Experiments and Numerical Modeling
- Date Crossref
- 06/07/2023
- Éditeur
- MDPI AG
- Type
- posted-content
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
-
Chang'an University pays non établi dans la noticeUniversité ou école supérieure
-
CCCC Highway Consultants (China) pays non établi dans la noticeEntreprise
-
Qinghai Huashixia Permafrost Highway Engineering Safety National Observation and Research Station pays non établi dans la noticeInstitution
-
School of Highway pays non établi dans la noticeUniversité ou école supérieure
-
State Key Laboratory of Road Engineering Safety and Health in Cold and High-Altitude Regions pays non établi dans la noticeStructure de recherche
Chang'an University, CCCC Highway Consultants (China) et Qinghai Huashixia Permafrost Highway Engineering Safety National Observation and Research Station, avec 2 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.